Supply Chain Network Design and Global Trade

Introduction

A supply chain network is the system of facilities, transportation links, suppliers, customers, information flows and governing policies through which products move from sources of supply to points of consumption. Network design determines where facilities are located, which markets they serve, how inventory is positioned and which activities are performed internally or by external partners. These decisions are among the most consequential in supply chain management because they usually involve substantial capital, long-term commitments and significant effects on customer service, cost, resilience and environmental performance.

Global trade adds further complexity. A firm may purchase materials from one country, manufacture in another, distribute through a regional hub and sell in many markets. Such arrangements require knowledge of sourcing, customs, trade documentation, Incoterms, tariffs, exchange rates, geopolitical risk and total landed cost. A low supplier price does not necessarily create a low-cost supply chain once freight, duties, insurance, handling, inventory and disruption risks are included.

This chapter presents practical frameworks for evaluating network configuration and global trade decisions. It emphasizes total-system thinking: a decision that improves one activity may worsen the overall supply chain.

Learning Objectives

By the end of this chapter, you should be able to:

1. Explain the purpose and main components of supply chain network design.
2. Evaluate facility-location and network-configuration alternatives.
3. Compare centralized and decentralized distribution systems.
4. Assess outsourcing and third-party logistics decisions.
5. Explain global sourcing, Incoterms, customs and essential trade documents.
6. Calculate and interpret total landed cost.
7. Evaluate geopolitical, regulatory, ethical and sustainability risks.
8. Recommend an appropriate network using cost, service, resilience and risk criteria.

1. The Supply Chain Network as a Strategic System

A typical network includes suppliers, plants, consolidation points, warehouses, distribution centres, retailers, business customers and final consumers. It also includes reverse flows for returns, repairs, recycling and disposal. The network may be physical, but it is coordinated by information systems, contracts, forecasts, orders and financial transactions.

Network design answers questions such as:

• How many facilities are required?
• Where should plants and warehouses be located?
• Which customers should each facility serve?
• Which products should be made or stocked at each site?
• Should inventory be centralized or spread across markets?
• Which activities should be performed internally?
• Which transportation modes and border crossings should be used?
• How should the network respond to disruption?

These questions are interdependent. Opening a warehouse can reduce delivery distance but increase fixed cost and inventory. Moving production offshore can reduce labour cost but increase lead time, pipeline inventory and exposure to border delays. A sound design therefore evaluates the network as a whole.

Strategic, tactical and operational decisions

Strategic decisions generally have a multi-year horizon. They include facility location, production capacity, ownership structure and major outsourcing arrangements. Tactical decisions include inventory policies, supplier allocation, transportation contracts and seasonal capacity. Operational decisions include shipment scheduling, order release, customs filing and daily warehouse assignments.

A strategic network should support the organisation’s competitive priorities. A low-cost retailer may favour large, efficient facilities and consolidated transport. A medical-device company may require regional inventory, strict traceability and rapid emergency delivery. A fashion company may value speed and flexibility more than minimum unit cost.

2. Facility Location and Network Configuration

Location factors

A facility should not be selected solely because land or labour is inexpensive. Important factors include:

• proximity to customers and suppliers;
• transport access, including ports, airports, roads and railways;
• labour availability, skill and productivity;
• utilities, land cost and construction conditions;
• taxes, duties, incentives and regulatory requirements;
• political and security conditions;
• climate, natural-hazard exposure and environmental obligations;
• availability of logistics providers and supporting industries;
• market growth and future capacity requirements.

The best location depends on the product and service promise. Perishable goods, urgent spare parts and high-value electronics may require proximity to customers. Bulk commodities may be located near raw materials or low-cost transport corridors.

Facility-location analysis

A basic screening method compares candidate locations against weighted criteria. If criterion j has weight wⱼ and location i receives score sᵢⱼ, the weighted score is:

where Sᵢ is the total score for location i, m is the number of criteria, wⱼ is the weight assigned to criterion j, and sᵢⱼ is the score of location i on criterion j. Usually, weights sum to 1. The method is useful for early screening, but scores are subjective and should be supported by cost, risk and feasibility analysis.

For a simple cost comparison, annual total cost can be represented as:

where TC is annual total cost; F is fixed facility cost; Q is annual volume; v is variable processing or handling cost per unit; T(Q) is transportation cost for the relevant volume; I is inventory-related cost; and R is monetised risk or expected disruption cost. The terms must be measured over the same period and in the same currency. This is a decision model rather than a universal law: the cost functions must reflect the actual network.

Centre-of-gravity screening

For a preliminary warehouse-location estimate, the centre of gravity can be calculated as:

Here qᵢ is the demand or shipment volume associated with market i, and xᵢ and yᵢ are its coordinates. The result is a geometric starting point, not a final location. It assumes that transportation cost is approximately proportional to volume and distance, and it ignores roads, borders, congestion, land availability, service constraints and nonlinear tariffs.

Worked example: weighted location screening

A company evaluates three candidate warehouse sites using four criteria. Weights are transport access 0.35, labour 0.25, customer proximity 0.25 and regulatory environment 0.15. Scores are from 1 to 10.

For Site B, the score is (0.35×7) + (0.25×8) + (0.25×8) + (0.15×7) = 7.55. Site B ranks first, although Site C has the strongest transport score. Management should next test Site B’s land cost, capacity, tax treatment, flood exposure and actual transport rates before making a commitment.

3. Centralized and Decentralized Distribution

A centralized system holds inventory in one or a small number of facilities. A decentralized system positions inventory in several regional or local facilities.

Centralization benefits from risk pooling. If independent markets experience variable demand, combined demand is relatively more predictable than each market separately. However, centralization can create a single point of failure and longer customer lead times.

Decentralization improves responsiveness but may duplicate inventory, equipment, labour and management. It can also complicate stock balancing. Many organisations adopt a hybrid design: slow-moving items are centralized, while high-volume or urgent items are stocked regionally.

The choice should consider customer service requirements, demand variability, product value, replenishment lead time, transport economics and disruption consequences. A facility configuration that minimizes cost under average demand may be unsuitable where service failures cause regulatory penalties or loss of life.

4. Outsourcing and Third-Party Logistics

Outsourcing transfers an activity or capability to an external provider. Third-party logistics (3PL) providers commonly perform transportation, warehousing, freight forwarding, customs brokerage, order fulfilment, packaging and returns processing. Fourth-party logistics providers (4PLs) may coordinate several logistics suppliers and provide broader network management.

Reasons to outsource

A firm may outsource to access specialist expertise, variable capacity, technology, geographic coverage or lower operating cost. A 3PL can consolidate shipments from multiple customers, operate a warehouse network and provide customs knowledge that would be expensive to develop internally.

Risks of outsourcing

Risks include loss of direct control, dependence on a provider, weak data visibility, hidden charges, service inconsistency, information-security exposure and difficulty exiting the contract. Outsourcing also does not transfer ultimate responsibility for legal compliance, product safety or ethical conduct. The buying firm remains accountable for selecting, governing and monitoring its partners.

Make-or-buy evaluation

A make-or-buy decision should distinguish avoidable and unavoidable costs. If an internal facility will remain open regardless of the decision, its unavoidable fixed cost should not be treated as a saving from making internally. Relevant comparison should include:

• provider price and accessorial charges;
• internal labour, space, equipment and supervision;
• technology integration and implementation costs;
• quality, damage and error costs;
• transition and termination costs;
• flexibility and capacity value;
• compliance, cybersecurity and continuity risk.

A strong 3PL contract defines service-level agreements (SLAs), pricing rules, liability, insurance, data ownership, audit rights, business continuity, subcontracting controls, performance remedies and exit assistance. Common performance measures include on-time-in-full delivery, order accuracy, inventory accuracy, claims ratio, dock-to-stock time and customs clearance performance.

5. Global Sourcing and International Trade

Global sourcing is the procurement of goods, materials, services or capabilities from international suppliers. It may reduce purchase price, provide access to technology or scarce materials, and support market entry. It also introduces longer lead times, currency exposure, quality variation, legal differences, communication barriers, sanctions risk and dependence on international transport.

A responsible sourcing process includes:

1. Define technical, quality, quantity and service requirements.
2. Screen suppliers for capability, financial stability, compliance and capacity.
3. Request comparable quotations and clarify the proposed trade term.
4. Audit quality systems, labour practices, environmental controls and security.
5. Evaluate total landed cost and risk, not only supplier price.
6. Negotiate specifications, payment, delivery, warranty and remedies.
7. Pilot orders and inspect performance before scaling.
8. Monitor the supplier continuously and maintain alternatives for critical inputs.

Global sourcing should also consider country-of-origin rules, intellectual property protection, forced-labour regulations, anti-bribery requirements, sanctions and export controls. Supplier diversification does not automatically create resilience if several suppliers depend on the same port, sub-tier manufacturer or raw material source.

6. Incoterms and Transfer of Responsibilities

Incoterms are standardized trade terms published by the International Chamber of Commerce. They allocate defined responsibilities between seller and buyer, including delivery point, transportation arrangements, export and import formalities, insurance under specified terms, and the point at which risk transfers. Incoterms do not determine ownership transfer, payment terms, product specifications or all aspects of customs law; these must be addressed separately in the sales contract.

Examples include:

• EXW (Ex Works): the seller generally makes goods available at its premises; the buyer takes substantial responsibility from that point.
• FCA (Free Carrier): the seller delivers to a carrier or named place and completes the responsibilities specified by the rule.
• CPT (Carriage Paid To): the seller pays carriage to the named destination, but risk transfers earlier under the rule.
• CIP (Carriage and Insurance Paid To): similar to CPT, with seller-arranged insurance requirements.
• DAP (Delivered at Place): the seller delivers to the named place, generally ready for unloading; the buyer normally handles import clearance and duties.
• DPU (Delivered at Place Unloaded): the seller delivers and unloads at the named place.
• DDP (Delivered Duty Paid): the seller assumes extensive responsibility, including import clearance and duties, subject to legal feasibility.
• FAS, FOB, CFR and CIF: maritime or inland-waterway terms used under their specific conditions.

The named place is crucial. “DAP Customer Warehouse, Nairobi” is more precise than simply “DAP Nairobi.” Organisations should avoid selecting terms by habit. The appropriate term depends on customs capability, transport control, insurance needs, tax registration and the desired allocation of risk.

7. Customs, Documentation and Compliance

Customs authorities control goods entering or leaving a country and assess compliance with national laws. Errors can cause delays, penalties, seizure, additional duty or loss of trusted-trader status.

Important customs concepts include:

• HS classification: assigning a product code under the Harmonized System. Classification affects duty, licensing, statistics and admissibility.
• Customs value: the basis on which duties may be assessed, subject to the importing country’s valuation rules.
• Country of origin: the country in which goods qualify as originating under applicable rules; origin is not always the same as shipping country.
• Duty and tax: import duty may be ad valorem, specific, compound or subject to preferential treatment. Value-added tax or similar taxes may also apply.
• Trade controls: restricted goods, sanctions, export licences and end-user requirements.

Common documents include the commercial invoice, packing list, transport document, certificate or declaration of origin, import or export permit, insurance certificate, inspection certificate and electronic customs declaration. The exact requirements vary by product, country, transport mode and trade agreement.

A commercial invoice normally identifies the buyer and seller, goods description, quantity, price, currency, payment terms, origin, Incoterm and shipment details. Descriptions should be accurate and specific; vague descriptions such as “parts” create classification and inspection problems. Documentation must be consistent across invoice, packing list, purchase order, transport document and customs declaration.

8. Total Landed Cost

Total landed cost (TLC) is the complete cost of acquiring and placing goods at the required destination, ready for use or sale. A practical model is:

where:

• P = product purchase price;
• E = export packing and origin handling;
• F = international and domestic freight;
• Iₛ = insurance;
• C_b = brokerage and customs-clearance charges;
• D = import duty;
• Tᵢ = import taxes that are not recoverable;
• H = destination handling and warehousing before sale;
• Q = quality, inspection and compliance cost;
• I꜀ = inventory carrying cost caused by the international lead time;
• R = expected cost of disruption, defects, claims or non-compliance.

All components should use the same quantity basis, currency, time period and tax treatment. Recoverable VAT, for example, may be a cash-flow item rather than a permanent cost. Expected risk cost can be estimated as probability multiplied by financial impact, but uncertain risks should also be presented qualitatively because probabilities may be unreliable.

Worked example: comparing two suppliers

A buyer needs 1,000 units. Supplier A quotes $18 per unit and Supplier B quotes $16.50 per unit. The following costs apply per shipment:

Supplier B has the lower purchase price but the higher total landed cost. A decision should nevertheless consider quality, lead time, capacity, payment terms, strategic dependence and the possibility that the risk estimate is uncertain. The analysis should be updated when freight rates, exchange rates or tariff rules change.

9. Geopolitical Risk, Resilience and Sustainability

International networks are exposed to tariffs, sanctions, war, diplomatic conflict, port closures, strikes, cyberattacks, export restrictions, pandemics, extreme weather and policy changes. Geopolitical risk is not limited to the country where a supplier is located. A supplier may rely on a foreign semiconductor, energy source, shipping lane or financial institution.

A practical risk assessment identifies:

1. the threat or disruption;
2. the affected node, route or tier;
3. probability and impact;
4. time to detect and recover;
5. available alternatives;
6. mitigation cost and owner.

Mitigation may include dual sourcing, regional capacity, strategic inventory, alternate ports, flexible contracts, supplier development, product redesign and scenario exercises. Resilience does not mean eliminating every risk. It means preparing for material disruptions and restoring acceptable performance at an acceptable cost.

Sustainability must be evaluated alongside cost and service. Network design affects transport emissions, packaging, energy use, waste, labour conditions and community impacts. A distant low-cost supplier may create higher emissions and social risk than a nearer supplier. Firms should measure relevant emissions, require supplier standards, conduct due diligence and avoid treating sustainability claims as reliable without evidence.

Ethical issues include forced labour, unsafe working conditions, child labour, corruption, discrimination, environmental damage and misuse of supplier data. Procurement professionals should maintain transparent selection criteria, segregation of duties, conflict-of-interest declarations and auditable decisions.

10. Technology and Data in Network Design

Modern network design uses enterprise resource planning systems, transportation-management systems, warehouse-management systems, geographic information systems, digital freight platforms and supply chain control towers. These tools can compare scenarios, track shipments, estimate emissions and identify delays.

Artificial intelligence and machine learning may support demand forecasting, route prediction, anomaly detection and supplier-risk monitoring. Their usefulness depends on data quality, clear decision authority and human oversight. A model trained on stable historical conditions may fail during a war, pandemic or sudden regulatory change. Organisations should validate data, document assumptions, monitor bias, protect confidential information and retain a human approval process for high-consequence decisions.

Digital customs and electronic documents can reduce manual errors and accelerate clearance, but cyberattacks, fraudulent instructions and system outages remain important risks. Access controls, authentication, backups, supplier cybersecurity requirements and incident-response procedures are therefore part of network governance.

11. Illustrative Case: Meridian Home Appliances

Background

Meridian Home Appliances sells 120,000 countertop appliances annually in three regional markets. Its current network uses one overseas manufacturer, one central distribution centre and local distributors. The manufacturer offers an attractive unit price, but lead time is ten weeks and demand has become more volatile.

Problem

Stockouts are increasing, air freight is being used during peaks, and a new port security requirement has caused unpredictable delays. Management is considering a second supplier, a regional warehouse and a 3PL-operated fulfilment operation.

Analysis

The current network has low purchase cost but high exposure to a single source and a single port. Centralized inventory provides some pooling, yet the long replenishment lead time requires large order quantities. Emergency air freight raises cost and emissions. The team maps supplier tiers, classifies products by margin and urgency, and calculates landed cost under normal and disrupted conditions.

Three alternatives are compared:

• retain the present structure and increase safety stock;
• add a second supplier in another country while retaining central distribution;
• use two suppliers, a regional fulfilment centre operated by a 3PL, and postponement of final packaging near the customer market.

The third alternative has higher facility and coordination cost, but it shortens response time, reduces dependence on one port and permits packaging to match local requirements later in the process. The 3PL contract includes inventory accuracy, order accuracy, on-time dispatch, customs responsibilities, cybersecurity, business continuity and exit provisions.

Approach and outcome

Meridian selects the second alternative immediately and pilots elements of the third. It qualifies the second supplier, negotiates a shared quality standard, reserves capacity at two ports and establishes a monthly total-landed-cost review. The regional fulfilment centre is introduced only for fast-moving products, while slow-moving products remain centralized.

The outcome is a hybrid network rather than a complete relocation. Purchase price rises slightly, but emergency freight decreases, service improves and the company gains an alternative supply route. The case illustrates that resilience is usually achieved through a portfolio of targeted measures rather than one expensive structural change.

Learning points

1. Purchase price is not the same as total landed cost.
2. A second supplier is useful only if it is genuinely independent.
3. Centralization and regional responsiveness can coexist in a hybrid design.
4. Outsourcing requires measurable governance, not merely a price comparison.
5. Network decisions should be tested against disruption scenarios, not only average conditions.

12. A Practical Network-Design Process

A disciplined project can follow these steps:

1. Define objectives: cost, service, resilience, growth, compliance and sustainability.
2. Map the current network: facilities, suppliers, flows, lead times, volumes and dependencies.
3. Segment products and customers: identify critical, urgent, high-value and stable flows.
4. Collect reliable data: demand, freight rates, duties, facility costs, inventory and service performance.
5. Develop alternatives: vary locations, capacity, sourcing, inventory and transport modes.
6. Calculate total cost: include fixed, variable, inventory, tax, risk and transition costs.
7. Test scenarios: demand growth, disruption, tariff change, currency movement and capacity loss.
8. Assess qualitative factors: compliance, labour, sustainability, strategic control and feasibility.
9. Select and implement: use pilots, stage gates and documented responsibilities.
10. Monitor and redesign: review performance as markets, regulations and risks change.

A network is not permanently optimal. It must be reviewed when customer geography, product design, trade rules, technology, transportation economics or geopolitical conditions change.

Chapter Summary

Supply chain network design determines the location, capacity, ownership and connections of facilities and flows. Effective decisions balance cost, customer service, inventory, flexibility, resilience, compliance and sustainability. Facility-location tools such as weighted scoring and centre-of-gravity analysis are useful for screening but must be supplemented by realistic cost and risk analysis.

Centralized distribution benefits from inventory pooling and standardization, while decentralized distribution improves local responsiveness. Hybrid structures often provide a practical compromise. Outsourcing and 3PL arrangements can provide specialist capability and flexibility, but they require strong contracts, performance measures, data governance and continuity planning.

Global sourcing creates opportunities but exposes the firm to longer lead times, customs requirements, currency movements, geopolitical disruption and ethical risk. Incoterms allocate specified delivery responsibilities and risk, but they do not replace a complete sales contract. Customs classification, valuation, origin and documentation must be accurate and consistent.

Total landed cost combines purchase, transport, duty, taxes, handling, quality, inventory and risk costs. It is a more reliable basis for sourcing decisions than supplier price alone. Technology can improve visibility and analysis, but data quality, cybersecurity, model limitations and human governance remain essential.

Key Terms

Centralized distribution: A system in which inventory is held in one or a small number of facilities.

Country of origin: The country that qualifies under applicable rules as the origin of goods.

Customs valuation: The determination of the value used to assess import duties and related charges.

Decentralized distribution: A system in which inventory is positioned across several regional or local facilities.

3PL: A third-party logistics provider that performs logistics activities for another organisation.

4PL: A provider that coordinates multiple logistics providers and broader supply chain activities.

Facility location: The selection of a geographical site for a plant, warehouse or other supply chain facility.

Global sourcing: Procuring goods, services or capabilities from international suppliers.

HS classification: Coding goods under the Harmonized System for customs and trade purposes.

Incoterms: Standardized trade terms defining specified delivery responsibilities, costs and risk allocation.

Inventory pooling: Combining demand or inventory across markets to reduce relative uncertainty.

Landed cost: The complete cost of acquiring and placing goods at the required destination.

Network design: The strategic configuration of facilities, flows, capacities and supply relationships.

Outsourcing: Transferring an activity or capability to an external provider.

Risk pooling: The reduction in relative variability achieved by aggregating demand or inventory.

Service-level agreement: A contractually defined performance commitment between a customer and provider.

Supply chain resilience: The ability to prepare for, respond to and recover from disruption.

Total cost of ownership: The complete cost of an option over its relevant life or decision period.

Trade documentation: Records required to support shipment, customs, payment and regulatory compliance.

Trade compliance: Adherence to customs, sanctions, export-control and other applicable trade laws.

Review Questions

Short Answer Questions

1. What is meant by supply chain network design?
2. State two advantages and two disadvantages of centralized distribution.
3. Why is purchase price an incomplete basis for global sourcing decisions?
4. What responsibilities may be allocated by an Incoterm?
5. Name four documents commonly used in international trade.

Long Answer Questions

1. Explain the main factors that should be considered when selecting a facility location.
2. Compare centralized, decentralized and hybrid distribution networks.
3. Discuss the benefits, risks and governance requirements of using a 3PL.
4. Explain how customs classification, origin and valuation affect international shipments.
5. Describe a practical process for designing and implementing a resilient supply chain network.

Analytical / Application Questions

1. A company has a low-cost overseas supplier with a ten-week lead time and a higher-cost local supplier with a two-week lead time. Develop a framework for deciding whether to use one supplier, both suppliers or a regional distribution model.
2. Using the total-landed-cost categories in this chapter, construct a comparison for two international suppliers and identify which non-financial factors could change the recommendation.
3. A firm’s only port becomes unavailable for six weeks. Recommend immediate and longer-term responses, and explain how each response affects cost, service, resilience and sustainability.

Multiple Choice Questions with Answers

Question 1

Which factor best explains why total landed cost is more useful than purchase price alone?

A. It excludes transportation costs.

B. It includes costs such as freight, duty, handling and inventory.

C. It is always lower than the purchase price.

D. It applies only to domestic purchases.

Correct Answer: B. It includes costs such as freight, duty, handling and inventory.

Question 2

Which distribution structure generally provides the strongest inventory pooling benefit?

A. A single centralized distribution centre

B. A separate warehouse for every customer

C. A decentralized network with no transfers

D. A network using only emergency shipments

Correct Answer: A. A single centralized distribution centre

Question 3

What is the main purpose of HS classification?

A. To select warehouse employees

B. To determine a product’s customs and trade code

C. To calculate customer satisfaction

D. To assign a sales territory

Correct Answer: B. To determine a product’s customs and trade code

Question 4

Which statement about Incoterms is correct?

A. They determine every payment condition in a sales contract.

B. They allocate specified delivery responsibilities and risk.

C. They eliminate the need for customs documents.

D. They guarantee that the buyer owns the goods at shipment.

Correct Answer: B. They allocate specified delivery responsibilities and risk.

Question 5

A location has scores of 7, 8, 8 and 7, with weights 0.35, 0.25, 0.25 and 0.15. What is its weighted score?

A. 6.95

B. 7.25

C. 7.55

D. 8.10

Correct Answer: C. 7.55

Question 6

Which is a significant risk of outsourcing logistics to a 3PL?

A. The firm automatically gains complete control.

B. Dependence on the provider and reduced direct visibility

C. All legal responsibility disappears.

D. Transport prices can never change.

Correct Answer: B. Dependence on the provider and reduced direct visibility

Question 7

What does a hybrid distribution network commonly do?

A. Uses only one facility for every product.

B. Combines centralized and regional inventory approaches.

C. Avoids all inventory holding.

D. Uses no external logistics providers.

Correct Answer: B. Combines centralized and regional inventory approaches.

Question 8

Which document normally provides details such as seller, buyer, price, currency and goods description?

A. Commercial invoice

B. Employee timesheet

C. Production schedule only

D. Sales forecast only

Correct Answer: A. Commercial invoice

Question 9

Which action most directly improves resilience against dependence on one supplier?

A. Removing all supplier audits

B. Qualifying an independent alternative source

C. Increasing reliance on the same port

D. Reducing visibility of sub-tier suppliers

Correct Answer: B. Qualifying an independent alternative source

Question 10

If purchase price is $18,000 and all additional landed costs total $5,500, what is the total landed cost?

A. $12,500

B. $18,550

C. $23,500

D. $24,500

Correct Answer: C. $23,500